project work

2. private void jButton3ActionPerformed(java.awt.event.ActionEvent evt)
{
this.setVisible(false);
new DELREC().setVisible(true);
}
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
this.setVisible(false);
new ADDREC().setVisible(true);
}
private void jButton2ActionPerformed(java.awt.event.ActionEvent evt)
{
this.setVisible(false);
new MODREC().setVisible(true);
}
private void jButton4ActionPerformed(java.awt.event.ActionEvent evt)
{
this.setVisible(false);
new DISPALL().setVisible(true);
}
private void jButton5ActionPerformed(java.awt.event.ActionEvent evt)
{

3. this.setVisible(false);
new DISPCLS().setVisible(true);
}
private void jButton6ActionPerformed(java.awt.event.ActionEvent evt)
{
this.setVisible(false);
new DISPREPORT().setVisible(true);
}

7. try
{
Class.forName("com.mysql.jdbc.Driver");
Connectioncon= (Connection)
DriverManager.getConnection("jdbc:mysql://localhost:3306/prashant","root","admin");
Statementsmt=(Statement)con.createStatement();
intrl =Integer.parseInt(rol.getText().trim());
Stringcname = na.getText().trim();
Stringcls = cl.getText().trim();
Stringstrm = st.getText().trim();
intpy = Integer.parseInt(ph.getText().trim());
intm=Integer.parseInt(ma.getText().trim());
intc=Integer.parseInt(ch.getText().trim());
intcmp=Integer.parseInt(co.getText().trim());
inte=Integer.parseInt(en.getText().trim());
inttotl=(py+m+c+cmp+e);
floatp=(float)(totl/5);
Stringgd;

8. if(p>=85)
gd="A";
else if(p>=75&& p<85)
gd="B";
else if(p>=65&& p<75)
gd="c";
else
gd="F";
StringstrSQL = "INSERT INTO
student(Roll_No,Name,Class,Stream,Physics,Maths,Chemistry,Computer,English,Total,Grade) VALUES
('"+(rl)+"','"+(cname)+"','"+(cls)+"','"+(strm)+"',"+(py)+","+(m)+","+(c)+","+(cmp)+","+(e)+","+(totl)+",'"+(gd)+"
')";
introwsEffected=smt.executeUpdate(strSQL);
JOptionPane.showMessageDialog(this,"Recordsuccessfullyinserted");
System.out.println(rowsEffected+" rowseffected");
smt.close();
con.close();
}
catch (Exceptione) {
JOptionPane.showMessageDialog(this,e.getMessage());
}
}

11. CODING

12. try
{
Class.forName("com.mysql.jdbc.Driver");
Connection con = (Connection)
DriverManager.getConnection("jdbc:mysql://localhost:3306/prashant","root","a
dmin");
Statement smt= (Statement) con.createStatement();
ResultSet rs=null;
String sna=jTextField1.getText().trim();
int no=Integer.parseInt(jTextField2.getText().trim());
String na=jTextField5.getText().trim();
String cl=jTextField3.getText().trim();
String st=jTextField4.getText().trim();
int py=Integer.parseInt(jTextField6.getText().trim());
int m=Integer.parseInt(jTextField7.getText().trim());
int c=Integer.parseInt(jTextField8.getText().trim());
int co=Integer.parseInt(jTextField9.getText().trim());
int en=Integer.parseInt(jTextField10.getText().trim());
jTextField11.setText(" ");
jTextField12.setText(" ");
int t=(py+m+c+co+en);
jTextField11.setText(" "+t);
int tt=Integer.parseInt(jTextField11.getText().trim());
float p=(float)(tt/5);
String gd;

13. if(p>=85)
gd="A";
else if(p>=75 && p<85)
gd="B";
else if(p>=65 && p<75)
gd="c";
else
gd="F";
jTextField12.setText(""+gd);
String gd1=jTextField12.getText().trim();
String qry="Updatestudentset
roll_no="+(no)+",name='"+(na)+"',class='"+(cl)+"',stream='"+(st)+"',physics="+(p
y)+",maths="+(m)+",chemistry="+(c)+",computer="+(co)+",english="+(en)+",tota
l="+(tt)+",grade='"+(gd1)+"' wherename='"+(sna)+"'";
int r=smt.executeUpdate(qry);
if(r==0)
JOptionPane.showMessageDialog(this,"record doesnotexixts");
else
JOptionPane.showMessageDialog(this,"record Upated");
con.close();
}
catch (Exception e)
{
JOptionPane.showMessageDialog(this,e.getMessage());
e.printStackTrace(); }

16. String cl = jTextField1.getText().trim();
DefaultTableModel model = (DefaultTableModel) jTable1.getModel();
int rows = model.getRowCount();
if (rows > 0) {
for (int i = 0; i < rows; i++) {
model.removeRow(0);

17. }
}
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
Connection con = (Connection)
DriverManager.getConnection("jdbc:mysql://localhost:3306/prashant", "root", "admin");
Statement stmt = (Statement) con.createStatement();
String query = "SELECT * FROM Student where NAME='" + cl + "'";
ResultSet rs = stmt.executeQuery(query);
while (rs.next()) {
int rl = rs.getInt("roll_no");
String cName = rs.getString("name");
String cls = rs.getString("class");
String st = rs.getString("stream");
int py = rs.getInt("physics");
int m = rs.getInt("maths");
int c = rs.getInt("chemistry");
int co = rs.getInt("computer");
int en = rs.getInt("english");
int tt = rs.getInt("total");
String gd = rs.getString("grade");
System.out.println(rl + "|" + cName + "|" + cl);
model.addRow(new Object[]{rl, cName, cls, st, tt, gd});
}
} catch (Exception e) {

18. JOptionPane.showMessageDialog(this, e.getMessage());
}
}
private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
String cl = jTextField1.getText().trim();
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
Connection con = (Connection)
DriverManager.getConnection("jdbc:mysql://localhost:3306/ashok", "root", "akt");
Statement stmt = (Statement) con.createStatement();
String query = "DELETE FROM Student where NAME='" + cl + "'";
int r = stmt.executeUpdate(query);
if (r == 0) {
JOptionPane.showMessageDialog(this, "RECORD does not Exixts");
} else {
JOptionPane.showMessageDialog(this, "RECORD is Deleted Plz check the List");
}
} catch (Exception e) {
JOptionPane.showMessageDialog(this, e.getMessage());
}
}

20. String query = "SELECT * FROM Student";
try {

21. Class.forName("com.mysql.jdbc.Driver").newInstance();
Connection con = (Connection)
DriverManager.getConnection("jdbc:mysql://localhost:3306/prashant","root","admin");
Statement stmt = con.createStatement();
ResultSet rs = stmt.executeQuery(query);
while (rs.next()) {
int rl = rs.getInt("roll_no");
String cName = rs.getString("name");
String cl = rs.getString("class");
String st = rs.getString("stream");
int py = rs.getInt("physics");
int m = rs.getInt("maths");
int c = rs.getInt("chemistry");
int co = rs.getInt("computer");
int en = rs.getInt("english");
System.out.println(rl + "|" + cName + "|" + cl);
model.addRow(new Object[] {rl, cName, cl, st,py,m,c,co,en});
}
} catch (Exception e) {
JOptionPane.showMessageDialog(this, e.getMessage());
}
}

23. String cl=jTextField1.getText().trim();

24. DefaultTableModel model = (DefaultTableModel) jTable1.getModel();
int rows = model.getRowCount();
if (rows > 0) {
for (int i = 0; i < rows; i++) {
model.removeRow(0);
}
}
String query = "SELECT * FROM Student where class='"+cl+"'";
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
Connection con = (Connection)
DriverManager.getConnection("jdbc:mysql://localhost:3306/prashant","root","admin");
Statement stmt = con.createStatement();
ResultSet rs = stmt.executeQuery(query);
while (rs.next()) {
int rl = rs.getInt("roll_no");
String cName = rs.getString("name");
String cls = rs.getString("class");
String st = rs.getString("stream");
int py = rs.getInt("physics");
int m = rs.getInt("maths");
int c = rs.getInt("chemistry");
int co = rs.getInt("computer");
int en = rs.getInt("english");

25. System.out.println(rl + "|" + cName + "|" + cl);
model.addRow(new Object[] {rl, cName, cls, st,py,m,c,co,en});
}
} catch (Exception e) {
JOptionPane.showMessageDialog(this, e.getMessage());
}
}

27. String sna=jTextField1.getText().trim();
String query = "SELECT * FROM Student where name='"+sna+"'";
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
Connection con = (Connection)
DriverManager.getConnection("jdbc:mysql://localhost:3306/prashant","root","admin");
Statement stmt = (Statement) con.createStatement();
ResultSet rs = stmt.executeQuery(query);
while (rs.next()) {
jTextField2.setText(""+rs.getInt("roll_no"));
jTextField3.setText(""+rs.getString("name"));
jTextField4.setText(""+rs.getString("class"));
jTextField5.setText(""+rs.getString("stream"));

28. jTextField6.setText(""+rs.getInt("physics"));
jTextField7.setText(""+rs.getInt("maths"));
jTextField8.setText(""+rs.getInt("chemistry"));
jTextField9.setText(""+rs.getInt("computer"));
jTextField10.setText(""+rs.getInt("english"));
jTextField11.setText(""+rs.getInt("total"));
jTextField12.setText(""+rs.getString("grade"));
float
p=(float)(rs.getInt("physics")+rs.getInt("maths")+rs.getInt("chemistry")+rs.getInt("computer")+rs.ge
tInt("english"))/5;
jTextField13.setText(""+p);
}
} catch (Exception e) {
JOptionPane.showMessageDialog(this, e.getMessage());
}
}